Nut-lock.



F.' w. woon.

NUT- LOCK. APPLICATION FILED MAR- 30. 1915- RENEWED JULY 25. 1916- 1,215,460.

' Patented Feb. 13, 1917.

I Inventor: ran? Wil aaj awa m r f FRANK W. WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY DIRECT, AND MESNE ASSIGN- MENTS, TO FLOATING WEDGE LOCK NUT CO. INC.,

A CORPORATIGN OF NEW YOK.

nun-Loon.

1 Application filed March 30, 1915, Serial No. 17,984. Renewed July To all whom it may concern:

Be it known that I, FRANK W. WOOD, a citizen of the United States, residing at New York, in the county and State of New York,

5 have invented certain new and useful Improvements in N ut-Locks, of which the following is a full, clear, and exact description.

The invention which constitutes the sub ject matter of this application relates to nut '0 looks, and has for one of its objects to roreverse movement but in which the bolt or screw to be locked, rather than the nut lock wedge, is mutilated so that the nut look i wedge will always'be eflicient to engage a fresh surface of the screw and in which the nut lock wedge can only be disengaged to permit reverse movement of the bolt or screw by a proper manipulation of-the nut lock wedge on the part of the operator.

Another important object of my invention consists in causing a positive lock between the bolt and nut, as distinguished from a mere frictional engagement, as soon as there is any tendency for either to recede longitudinally from the other. The nut lock wedges heretofore in use, have also been found not to be reliable in other respects. In certain positions of the bolt with such wedges, where the weight of the wedge would exercise a force opposite to the direction of the frictional force exercised by the screw the wedge would not engage with the screw, and furthermore, after short use, the teeth of such lock wedges would frequently be so impaired as to be useless.

It is one of the main objects of the present invention to provide a nut lock wedge of the character described whereby the foregoing defects will be overcome.

Other important objects and advantages will more fully appear from the detailed description below taken in connection with the accompanying drawing, in which,

Figure 1 is an end view of the nut and Specification of Letters Patent.

Patented Feb,- 13, 1917. as, 1916. Seria1 No.1 11,274. I

bolt with sition.

Fig. 2 is a side view thereof. with a part of the nut broken away to show the relatlve location of the nut and locking member thereon.

' 3 is an enlarged view of Fig. lillus tratlng the inoperatlve position assumed by as the nut is being the locking member screwed upon the bolt.

similar to Fig. 3 in locln'ng posithe locking member in loo g P Fig. 4 illustrates a view with the locking member tloln. d

igs. 5 an 6 are enlarged fragment views of Figs. 3 and 4 respectively. My

Figs. and .8 are enlarged fragmentary views of Figs. 1 and 2, respectively.

Referrlng to the drawing in detail, the reference numeral 1 indicates a bolt of ordinary construction having screw-threads 2 at one end upon which a threaded nut 3, of suitable construction, is adapted to be screwed.

The nut is provided with a substantially V-shaped'recess 4 tapering inwardly from its central bore and terminating in a seat or groove 5 which eirtends parallel to the axis of the nut and substantially from one end of the nut to the other. The V-shaped recess with its appropriate seat isadapted to receive the locklng member which comprises a flange 6 with an inclined edge 7 at each end thereof. Thev thickness of the flange 6 preferably increases gradually as the distance from. the axis decreases. The inner thicker end with screw-threads 8 whose pitch substantially coincides with and forms, when in inoperative position, continuations of the screw-threads on the nut so that the nut may be screwed on and off the bolt at will.

The locking member only partially fills the recess and is so constructed that it has. an oscillatory movement within said recess. When the nut containing the locking memof the flange is provided 3 her is not in screw-threaded connection with the bolt the locking means would fallout, but to obviate this the nut containing the same, is provided with pins 9 placed in front of the inclined edges 7, which effectively maintains the locking member-in place. The inclination of the edge is very slight and. just suflicient to prevent the lock member from falling from the nut. vThe front edge 15 of the flange or wedge 6 is substantially By th Figs. 4 and v6,

in the line-m-m which is inclined to the line A drawn through the center of the screw 1 I the engaging teeth threads on the to be engaged, and thereby the crests of the engaging teeth would not be impaired by the troughs of the screw 1 and the troughs 16 of would be in their extreme biting engagement with the crests of the screw 1. 7

When the nut is being screwed on to the bolt the locking member, owing to the friction between the threads thereon and the member not supporting it, will be oscillated to one extreme position in the recess 4:. In this" particular position the threads on said locking member will bein alinement with the threads on the member supporting it and thelatter will be free to be screwed in place. The locking member is so pivoted, however, that when there is any the nut to be screwed in the reverse direction bring it into locking engagement with the bolt. 'To remove the nut from the bolt it is necessary to hold the loc g member in such position that the threads thereon are in perfect alinement with the threads on the nut and this may be done by the finger nail or any other suitable tool.

As ordinarily constructed nut locks of this construction depend entirely upon a frictional engagement between the threads of the locking member and the threads of the bolt. In my device I have provided for a positive lock against reverse movement of the nut. Referring particularly to Figs. 5 and 6 it will be seen that in its operative position the locking member lies against the side 10 of the recess, whereas in locln'ng position the loc g member approaches and is finally moved against the side 11 of the recess. In moving to this position the point 12 of the locking member moves to the left (as shown in Fig. 6) and acts in conjunction with the bolt a d the locking member as a toggle, the theoretical pivot of which is at the point 12, so that as the point 12 approaches a line passing through the centers of rotation of the bolt and locking member the pressure between the bolt and said point is continually being multiplied and being, as it is, a point or a line there will be produced a gouging action upon the bolt. This gouging action increases until the point 12 passes through the centers of rotation of the locking member and the bolt and at this point of maximum pressure the locking member contacts with the side 11 of the recess and holds the same home, it may be given the said member will be oscillated in the other direction -wh1ch W111 .be clear that in ordinary use no such'force' to separate the nut and bolt is ever found to exist. I

If desired, as soon as a slight reverse move,- ment in order to causethe wed 3e member to positively engage the bolt by gouging it slightly, as shown in Fig. 6, thereby furnishiiig a permanently locking set between the said wedge and bolt which I have found in ractice is not overcome by those vibratory and other forces which tend to loosen the nuts.

. What I claim is: v

1. A nut lock comprising character described having a V-shaped' recess therein, and a V-shaped rocking member of less width than the said recess and having a face at the inner end threaded to register with the thread on the-:nut when in the unlocked position of said locking member, said rocking member adapted :to engage one of a nut of the the walls of the recess when in the unlocked position, the locking member having one edge substantially perpendicular to the tangential line extending through the point of intersection between said threads of the rocking member and such edge and adapted to form a toggle action with the bolt and to engage the other wall of the recess when in locked position. p

2. A bolt nut the threaded bore of which is formed with a gap the walls of which converge in the direction of the periphery of the nut in combination with a locking member laterally movable in-the gap, and-comprising a wedge-shaped member having threads on its enlarged-end and one edge substantially perpendicular to a tangential line passing through the point of intersection between said edge and said threads, the bolt and the locking member constituting a toggle the theoretical pivot of which toggle is at the upper end of said locking a gouging action is effected by said locking member upon the bolt when the nut is moved relatively to the bolt in the reverse direction, said gap and said locking member so constructed that the latter contacts with and is limited in its movement by one of the walls of the former whenthe axis of the bolt, the center of oscillation of the locking member and the theoretical center of the toggle are substantially located in the same straight line and a line passing through the perpendicular edgeof said locking member will be inclined to said straight line.

member whereby from further movement. Any tendency now suflicient of course it on the bolt -but the nut is screwed 3. A bolt nut the threaded bore of which is formed with a gap the walls of which converge in the direction of the periphery of the nut, in combination with a locking member laterally movable in the gap and having means cooperating with means on the nut for maintaining said member in said gap, the rocking member comprising a wedgeshaped member having threads on its enlarged end and one edge substantially perpendicular to a tangential line passing through the point of intersection between said edge and said threads, the thread portions at the perpendicular edge constituting the engaging teeth of the wedge,

the bolt and the constituting a toggle the theoretical pivot of which toggle is substantially at one of the upper corners of said locking member whereby a gouging action is effected between the crests of the threads of said nut and the troughs of the engaging teeth of said wedge said locking member when the nut is reversely moved relatively to .the bolt.

In testimony whereof I affix my signature 25 n the presence of two subscribing witnesses.

FRANK W. WOOD. Witnesses:

M. LAWSON DYAR, WM. BOHLEBER. 

